首页
登录
职称英语
[originaltext] Not long ago, some of you may have read about the team of mou
[originaltext] Not long ago, some of you may have read about the team of mou
游客
2025-02-09
1
管理
问题
Not long ago, some of you may have read about the team of mountain climbing scientists who helped to recalculate the elevation of the highest mountain in the world, Mount Everest(珠穆朗玛峰). Of cause the elevation of Mount Everest was determined many years ago using traditional surveying methods. But these scientists wanted to make a more precise measurement, using a new method that takes advantage of recent advances in technology; it’s called the Global Positioning System. The Global Positioning System uses 24 satellites that circle the earth. Each of the satellites is constantly sending out signals, and each signal contains important information that can be used to determine the longitude, latitude and elevation at any point on the earth’s surface. Well in order to use the system to calculate amount of Everest’s elevation. Scientists need to put a special receiver on the summit to receive signals from the satellites. The problem with this was that in the past, the receivers were much too heavy for climbers to carry. But now these receivers have been reduced to about the size and weight of a hand-held telephone, so climbers were able to take the receiver to the top of the Everest, and from there, to access the satellite system signals that would allow them to determine the precise elevation. And it turns out that the famous peak is actually a few feet higher than us previously thought.
选项
A、To indicate how climbers communicated
B、To show that climbers enjoyed many comforts
C、To show that modem telephones work at high altitudes
D、To emphasize how small some equipment had become
答案
D
解析
Why does the speaker mention a hand-held telephone?
转载请注明原文地址:https://tihaiku.com/zcyy/3949684.html
相关试题推荐
[originaltext]WearegoingtostarttodaytodiscussCongressionalaids.Th
[originaltext]Notlongago,someofyoumayhavereadabouttheteamofmou
[originaltext]Notlongago,someofyoumayhavereadabouttheteamofmou
[originaltext]M:HeyTeresa!thanksforagreeingtohelpmereviewallthishis
[originaltext]M:HeyTeresa!thanksforagreeingtohelpmereviewallthishis
[originaltext]M:HeyTeresa!thanksforagreeingtohelpmereviewallthishis
[originaltext]W:Hi,Mark,Ididn’tknowyoucouldpaint.M:Well,I’mjustlea
[originaltext]W:Hi,Mark,Ididn’tknowyoucouldpaint.M:Well,I’mjustlea
[originaltext]W:Hi,Mark,Ididn’tknowyoucouldpaint.M:Well,I’mjustlea
[originaltext]W:Hi,Mark,Ididn’tknowyoucouldpaint.M:Well,I’mjustlea
随机试题
Lackgovernmentsupport,theyhadtoapproachsponsors,organizers,andmusician
IMPACTSANDMASSEXTINCTIONS(1)Met
Wouldyoubehappierifyouspentmoretimediscussingthestateoftheworl
以下选项中不属于经典性条件反射现象的是()A.谈虎色变 B.画饼充饥 C.
下列不属于清静养神的内容是A.恬淡虚无 B.劳耗心神 C.清净为本 D.少
共用题干 BritishNewspapers_______(46).The
平均消费倾向与平均储蓄倾向之和( )。A.为大于1的常数 B.为大于0小于1
关于因果关系,下列说法正确的是A.甲故意伤害乙并致其重伤,乙被送到医院救治。当晚
公安机关有法律赋予的权力和强大实力,坚持( )才能保证其正确运用。A.党的领导
因故中止施工的建筑工程恢复施工时,应当向发证机关报告,中止施工满1年的工程恢
最新回复
(
0
)